I have an app which uses the Facebook SDK 3.0 and I'd like to make it possible, that a user can logout from facebook in my app.

Is there any possibility, to logout or force a login dialog?

I tried to use the authorize() method from the older facebook sdk but I'm not able to merge it with the session things from the new sdk, so I have to do it all with session from sdk 3.0 or with the Facebook class from the older sdk.